Merge pull request haskell-servant#1068 from cocreature/monadmask

Add MonadMask instance for Handler
CraigTreptow · Nov 6, 2018 · 56d95ae · 56d95ae
2 parents 3f56b86 + 95e66fa
commit 56d95ae
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/servant-server/src/Servant/Server/Internal/Handler.hs b/servant-server/src/Servant/Server/Internal/Handler.hs
@@ -11,7 +11,7 @@ import           Prelude.Compat
 import           Control.Monad.Base
                  (MonadBase (..))
 import           Control.Monad.Catch
-                 (MonadCatch, MonadThrow)
+                 (MonadCatch, MonadMask, MonadThrow)
 import           Control.Monad.Error.Class
                  (MonadError)
 import           Control.Monad.IO.Class
@@ -29,7 +29,7 @@ newtype Handler a = Handler { runHandler' :: ExceptT ServantErr IO a }
   deriving
     ( Functor, Applicative, Monad, MonadIO, Generic
     , MonadError ServantErr
-    , MonadThrow, MonadCatch
+    , MonadThrow, MonadCatch, MonadMask
     )
 
 instance MonadBase IO Handler where